Method of manufacturing turbine-blade strips.



M. A, THIBL. METHOD OF MANUFACTURING TURBINE BLADE STRIPS.

APPL'IGATION FILED JULY 9, 1907.

Patefited Mar. 29, 1910 v QM [NV/51V TOR. Mam am A 7 TOR/v5 14W v U ITED STATE S on-F1012;

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Murnon on MANUFACTURING T RBINE-BLADE snares.

strips. I

is the produc mounting the ring segment, which is then secured inplace in the turbine.

A further object isthe production of a simple or ring segments for blades and van-es.

These and other objects I attain by adhering to a method of operation embodying the successivesteps herein described and illustrated.

cation and forming 1s a side view 0 Fig.3 is a side'- view of the n1ounting.e1e-' ment illustrating a step'in its construction;

Fig. .4 is a-plan View of Fig. 1; Fig. 5 is'an. of a'portion of Fig-. 1 and, 8 are respectively, plan, end; blade embodied insiny;

enlarged View Figs. 6 7 and and side views of a invention. 7

In carrying I out my invention suitable] tending slots 11 are number of'radially cut across a lateral'face 12 of'a'jringor an? nular band-132' .The slots llg-extendvlongis tudinally into-the ring-at, equal angles to its axis or center lineland are d'eeferat the ace of the" .14- in'-. Fig. 3. e ring is "severed. ande'd', being.

inner than atthe'outer ri" q, as'shown by the er the slots 11' arecu at a suitable-point'and ex shaped over al-f0rni ,1into' ;-a' segment- 01f a' ringfof larger diameter.

periheral' Thefoperation otbending the ring to a larger. diameter compresses" the 'metal of the r ng" adj teens-ts; A surface 'as'. inn ch as the *in'etal adjacent to innerperipheral face islexpanded' an 'sequentlyathe ts 11 Mel-changed -beie iwi ei ed tthe ace p p Specification of Letters-Patent. Application fi' led July 9; 1907; Serial No. 382.873.

to a method of e fits into the slots '11 the blades or .-'fa ces of the slots.

method of constructing the base ring:-

, openings of the In the drawings accompanying this applia part thereof;- F igure 1;. a 'segmental portion or blade mounting element with several of the blades attached; Fig. 2 is; a plan view and mounting portion to blades ofthe -diiig'erent. rows I glesto" he --'axis of the ,rOtOr "element, and with my tionseafterj they are in Since the 1 required 13031131011 of the blades lgg ybe eta-mined, the slots. 11' can be. Tout at H p c o theblades-may' e s edtogether 'n either before or after the the"; out-e11 Periphs-rfl" h vanesitare-formed' byslottlng', as described,

Patented and contracted at the outer peripheral face of the-ring. The extending portions-15b tween the slots by the bending, and therefore maintain their original sha'pe,-.and form arches between the slots 11," the radii'of which areequal to the original radius 'of the ring 13. The blades 16, which arecrescent shaped in cross section are swaged a t. one end to form a base or mounting portion 1'1 which ment.

The face 18 of the blade fits against are practically unstrain'ed f ofthe mounting segthe undercut face 19 of the'slot and the lat eral faces of the adapted to form a losefit with the lateral 7 After the bladesare assembled in the segment 713,1 the. segment is put in place in a slot mounting portion El-Te p 20, formed inthe rotor'element'of theturbine, and rigidly see '7 cured thereto by driving a calking s trip- 21 between the slotted 'face 12501 the; segment 13 and the adj'a'centface of the rotor slot.

Thev calking strip 211 closes the lateral v slots ll and locks the blades 16 in place by .causin the strains induced by the metal of the oW,-in yielding to the calking, 'and'" thereby' 'gripthev blades and" hold them .se-

foundto beloose'after the calkingstrip is :in place, they can be tightenedby attening .cu-relyin place. If any of the blades are blade, thereby driving the walls of the slot.

vinto more; intimate contact with .theibla'de and j'causing; th'ejnto f grip theTblademore It' is. necessary. because of the different conditions encountered, to set the atdifierent aninvention."thezneeessiti of gaging or turning thelblades to suit existing condiplace is overcome.

orsegment; of a; ring of larger diama -ri'n eteniian thelmounting slot. into-which it is tote? ,Ventually mounted. The ring or ring segment-is then decreased in diameter by shapl ng 1t oyer a form, WhICh'lS the diameter ofthemountlng slot. hth' a ring so constructed the extending portions 15 are arched-by the slots and the mounting ring is to allpractical purposes thesame as the mounting ring of the blades Throughout the claims I'have utilized the term blades with no idea of limiting the scope of theinvention to blades, the word being used in its 'broader'sense; that is, to include both the moving blades and station;

' ary vanes.

hat I claim '1. The method of. manufacturing blade holding elements, which-consists in cutti'n a number ofnotches in a substantially radial direction acrossthe lateral face of a circudirection across. a Iateralface of. acircular band, and which extend into the ring at an. angle-to the axis. being deeper at one peri heral fac'eof-the ring-than at the other,

serering thering and bendin it to form a segment of a circle of larger diameten 8. The method of manufacturing blade holdinovele" ts, which consists in cut-ting a number offs )tantially radial slots across a lateral". .ace' circular ring, which slots .face.

extend longitudinally of the ring at an angleto its axis, severing the ring and bend-- ing it to form diameter.

4. The method of manufacturing base strips for blades, which consists in cutting a number of' radially extending slots across the lateral face of a ring or ring segment, then bending the ring or ring segment to part of a ring of different form a segment-of ,a rlng of different diameter of which the slotted face is a lateral 5. The method of manufacturing base strips for blades, which consists in cutting a'number of radially extending slots across the lateral face of a metallic lin which 7 slots extend into the ring and are deeper at the innerperipheral face, then bending the ring to form a. segment of difierent diameter of which the slotted-face is a lateral face.

G. The method of manufacturing base strips for blades, wh1ch consists in cutting slots across a face of a strip and then bending the strips to form a ring or ring segment so that the slots, are narrower at theouter peripheral face of the ring or ring segment.

In testimony whereof, I have hereunto subscribed my name/this 6th day 'of July, l- OT.

MARTIN A; THIEL.

Witnesses: V

CHARLES W. MOGHEE, E. W. MCCALLISTER. 

